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Simple mkobsfile + invertfit questionStarted by:Gaba_p, 09/13/2010 03:28PM
Hi,

this is my question: which one (if any)
of this tasks (mkobsfilke, invertfit) is
the one in charge of matching stars
across different exposures?

I'm working with a field observed in 4
different fields through 3 different
exposure times. I realized...

1747

By: Gaba_p

09/13/2010 03:28PM

Simple photometry errors questionStarted by:Gaba_p, 02/23/2012 01:34PM
Hi,

my question is fairly simple I think.
When the photometry process is done, I'm
presented with a file containing several
columns named:

# 1 object id
# 2 x
# 3 y
# 4 V
# 5 error(V)
# 6 BV
# 7 error(BV)
# 8 UB
# 9 error(UB)
# 10 VI
# 11 error(VI)

T...

1452

By: Gaba_p

02/23/2012 01:34PM

Simple scripting questionStarted by:Gaba_p, 04/13/2009 09:17PM
Hi,

I've written a procedure script which
uses the 'fields' task. I can't make it
stop asking me to confirm the lines to
be extracted. This is how the 'fields'
parameters are set:

fields.mode = 'hl'
fields.files = 'file1'
fields.fields = "1-2"
fields....

1774

By: Gaba_p

04/13/2009 09:17PM

Simple scripting question 2Started by:Gaba_p, 04/14/2009 02:26PM
Hi (me again),

I'm trying to assign values read from a
file to variables with different names
(in a procedure script). Maybe an
example will explain better what I want
to do:

procedure ()

struct *list

begin

int i
string variable

list = 'file1'
i =...

1465

By: fitz

04/14/2009 02:26PM

Simple tvmark questionStarted by:Gaba_p, 11/11/2009 08:50PM
Hi all,

I'm trying to do something very simple:
I want to delete all stars found by
daofind inside a given region (an
arbitrary polynomial) . I've been
experimenting with the 'e', 's', 'f',
keystrokes and ':save', ':write', etc..
commands, but I can't ...

4698

By: fitz

11/11/2009 08:50PM

Slalib packageStarted by:Gaba_p, 06/18/2009 01:33PM
Hi,

I need to access one of 'slalib'
functions and I can't figure out how to
do it. I've tried typing 'ecl> math',
'ecl> slalib', 'ecl> dtf2r',
'ecl> math.slalib' and more
combinations of this, but nothing.

Thanks,
Cheers!

2070

By: fitz

06/18/2009 01:33PM

Slow center markingStarted by:, 05/06/2006 11:29AM
Hi all,

I am working on photometry of an Abell
cluster with some 500 galaxies in the
field. Galaxies have to be marked
manually. I am doing this via center
task, interactively. I've enabled the
the neccessary options to mark the
centers in ds9, and th...

5518

By:

05/06/2006 11:29AM

Slow cygwin IRAF problem.Started by:Mattias Ergon, 10/16/2009 05:38PM
Hi!

I have a problem with cygwin IRAF
installed on my XP laptop. Sometimes
(often) IRAF tasks are running very
slowly. Checking the CPU it's more or
less idle. Running an strace on
x_images.e shows that most time is spent
in connecting to port 1432. Th...

2085

By: Mattias Ergon

10/16/2009 05:38PM

Smoothing image segmentsStarted by:tiffa019, 01/30/2009 03:28PM
I'm working on a set of images with
IRAF. I have replaced a bad (over
saturated) part of an image with another
section from a good image, but I want to
do a smooth transition between the two
pieces (something like a 3rd order
polynomial). I've been to...

2185

By: fitz

01/30/2009 03:28PM

Snow Leopard and scriptsStarted by:dbrenner, 09/13/2009 02:43PM
I'm having trouble running scripts on
Snow Leopard. I ran a script using print
and imarith but am having no luck using
imexpr and iminsert. I've used imexpr
many times previous with earlier
versions of Mac OS.

Here is one example of what didn't work.
p...

4225

By: rohit

09/13/2009 02:43PM

SNR calculation in splotStarted by:gmaravel, 06/16/2015 04:59PM
Hi!

I know that the "m" keystroke in splot
gives the rms and snr of a spectrum.
However, I would like to understand how
this is calculated, but there is nothing
(obvious at least) at the help page of
splot.

I did a searvh in the forum to see if
...

3466

By: fitz

06/16/2015 05:05PM

some apextract help files fixesStarted by:Jason Quinn, 04/24/2008 07:31PM
Some of the defaults shown in the help
files are out of sync with the current
default parameters. I've been learning
some spectroscopy lately and reading the
help pages in the
[b:0ca26052c2]onedspec[/b:0ca26052c2]
and
[b:0ca26052c2]twodspec[/b:0ca26052c...

2188

By: Jason Quinn

04/24/2008 07:31PM

some daophot inconsistenciesStarted by:Jason Quinn, 07/05/2008 01:29AM
I noticed some minor bugs and
inconsistencies in the handling of
certain things in
[b:030987ae51]daophot[/b:030987ae51]
package that should be easy to fix.

1) The [b:030987ae51]phot[/b:030987ae51]
and
[b:030987ae51]pstselect[/b:030987ae51]
tasks' outpu...

1949

By: fitz

07/05/2008 01:29AM

specify background region around targ...Started by:baddison, 04/10/2008 09:47PM
Hi,
I was wondering if anyone knows how to
specify a background region near a star
(for instance having a box of a certain
area to the right or left of the
target/comparison star). My problem is
that both my target and comparison stars
are both near t...

1615

By: valdes

04/10/2008 09:47PM

Spectorphotometry standard starsStarted by:delta_kuadrant, 12/03/2009 11:45AM
Hi all

Where I can find or download
spectrophotometry standard stars for
IRAF database? and how can I integrate
those stars into database?
I want to do flux calibration for my
spectra
sorry for noob questions

thanks

-PJ-

3220

By: fitz

12/03/2009 11:45AM

Spectra and image slicersStarted by:esemenko, 01/13/2007 11:37AM
Hi, everyone! My question addressed to
people who use Iraf for processing of
spectra obtained with an image slicer.
Our slicer split image into 3 slices, so
2 slices shifted relatively to central
one approximately on 3 pixels. What is
method you are usi...

4500

By: esemenko

01/13/2007 11:37AM

Spectroscopic WCS referenceStarted by:paco, 06/07/2011 06:10PM
For a simple onedspec format fits file,
does the wavelength for pixel 1 refer to
the left (short wavelength) edge of the
pixel? or the center? I think the left
edge (as for an image WCS), but would
like to be sure.

And if I convert that fits file to ...

1363

By: valdes

06/07/2011 06:10PM

Speeding up repetitive taskStarted by:The Big H, 12/16/2009 03:33AM
I have to perform a large number of
repetitive tasks on a large number of
files. Basically I have to do the
following:

imcopy DataFile[0][*,XX].fits
SingleXX.fits
program1 SingleXX.fits
{inputs that program1 will prompt me
for}
program2 SingleXX.fits
...

1415

By: fitz

12/16/2009 03:33AM

splitting a fits cube?Started by:Arp, 11/18/2010 12:57PM
Hi!

Though this fits file comes from CASA, a
radio astronomy software, it is just a
"simple" fits file. But now I have one
with 4 images in one fits file. Using
DS9 I can browse through all of the
channels. Now I want to create 4
individual fits files ...

4237

By: Arp

11/18/2010 12:57PM

splot - invert colourStarted by:babbloo, 12/06/2009 01:43PM
Hi

When I use splot to analyze the FITS
spectra, is there anything I could do to
save the image in black and white
format, so that it looks clear when I
print it on a paper?

I need to include images in a report and
currently taking screenshots of the ...

2578

By: fitz

12/06/2009 01:43PM

Splot background colorStarted by:dmag, 09/14/2016 04:13PM
Hi,
i know that it is probably a stupid
question but i am not able to find a
solution.
How can i invert the
background-foreground color in the IRAF
plot windows?
Splot, specplot, identify, continuum..
every task show a white plot on black
backgroun...

2335

By: fitz

09/14/2016 06:08PM

splot deblendingStarted by:Guest, 01/20/2010 02:02PM
Dear IRAF team,
I am using IRAF now for deblending and
gaussian fitting the emission
lines. Results are good, but it would be
nice to know measurement errors
of the resulting gaussian profile
(center, flux, ...). Is it possible to
get those? I have f...

1605

By: fitz

01/20/2010 02:02PM

SPLOT errorStarted by:owen, 04/17/2008 07:42AM
Hi, does anyone know what is "PANIC in
`/iraf/iraf/noao/bin.redhat/x_onedspec.e':
File write error (STDERR)" meaning? This
occurs when quiting SPLOT task by q-key,
and then the xgterm doesn't response any
more...

Owen

2639

By: owen

04/17/2008 07:42AM

splot FEROS spectraStarted by:giannicatanzaro, 07/23/2013 08:10AM
Hi all

I downloaded FEROS spectra from the ESO
archive, but I have problem when I use
splot to see the spectrum.

Giving the command
splot
r.FEROS.2007-01-30T01:57:04.945.1051.fits[*,1]

I get a plot not calibrated in lambda
but in "position", start...

1103

By: giannicatanzaro

07/23/2013 08:10AM

splot Gaussian Fit--higher precision--Started by:rohit, 11/24/2008 06:52PM
I am using SPLOT to identify the
wavelenghts of telluric lines by fitting
a Gaussian (using the key "k" ). IRAF
gives the wavelength value to 5th
decimal point. I would like IRAF to give
me to 7th decimal point. The telluric
lines that I have plotted ar...

4208

By: valdes

11/24/2008 06:52PM

splot Gunn-Stryker spectraStarted by:stoughto, 05/06/2010 01:45PM
I downloaded gunn stryker spectra from
ftp://ftp.stsci.edu/cdbs/grid/gunnstryker/

Is there a way to splot these? I get
this error when I try:

onedspec> splot
/home/stoughto/das/gunnstryker/gs_1.fits
ERROR: MWCS: dimension mismatch
(mw_open)

and ...

1577

By: fitz

05/06/2010 01:45PM

splot in histogram modeStarted by:, 12/16/2008 01:17PM
Hello guys,

I want to splot some spectra in
histogram mode. So I epar splot and set

(options = histogram) Combination of
plotting options:
auto,
zero, xydraw, histogram,

nosysid, wre...

2539

By:

12/16/2008 01:17PM

splot output fileStarted by:Alaa, 12/14/2014 06:44PM
Hello,
I need some help regarding splot. I'm
looking for a way to control the output
file of splot task.
I use the following command to analyze
my spectrum and save the results to the
output file of the splot

> splot spec1.fits
save_file="spec1-s...

1859

By: fitz

12/15/2014 05:01PM

SPLOT task does not display the right...Started by:Amanpreet, 10/26/2017 06:54PM
Hi all,

My splot package does not display the
right information for any command. e.g.
if I want to check the position of the
cursor, it does not display the
wavelength and flux for a spectrum. It
is not working on any spectrum and I
tried "unlearn sp...

706

By: Amanpreet

10/26/2017 06:54PM

splot wavelength calibrationStarted by:heather, 05/10/2011 07:07PM
I'm looking at spectra which were
originally SDSS stellar spectra,
rebinned to a linear wavelength scale by
IDL code in the SSPP (segue pipeline)

Looking at the header of the fits file,
CRVAL1 = 3850 and CD1_1 = 1. (both
Angstroms)

When I plot the dat...

2019

By: heather

05/10/2011 07:07PM

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